Consolidated Statement Of Income
| Concept | 2023-04-01 to 2023-12-31 | 2022-04-01 to 2022-12-31 | 
|---|---|---|
| Consolidated statement of income | ||
| Statement of income | ||
| Net sales | 
                                                4,279,043,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,108,591,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cost of sales | 
                                                3,258,819,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,132,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Operating expenses | ||
| Other operating expenses | ||
| Provision for retirement benefits for directors (and other officers) | 
                                                8,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,161,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Operating expenses | ||
| Operating expenses - general | ||
| Remuneration for directors (and other officers) | 
                                                62,369,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                76,613,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Rent expenses on land and buildings | 
                                                27,157,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,372,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Depreciation | 
                                                8,790,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,723,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Operating expenses | ||
| Selling, general and administrative expenses | 
                                                564,259,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                553,172,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                76,734,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                66,666,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Operating expenses | ||
| Ordinary profit (loss) | 
                                                454,244,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                438,420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Gross profit (loss) | 
                                                1,020,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                976,197,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Operating profit (loss) | 
                                                455,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                423,024,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| General and administrative expenses | ||
| Salaries | — | — | 
| Operating expenses | ||
| Net sales | ||
| Extraordinary income | 
                                                98,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-operating income | ||
| Interest income | 
                                                16,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Dividend income | 
                                                50,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-operating income | 
                                                1,231,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cost of sales | ||
| Selling, general and administrative expenses | ||
| Legal welfare expenses | 
                                                38,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,252,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Extraordinary losses | 
                                                56,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-operating expenses | ||
| Interest expenses | 
                                                2,951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,282,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-operating expenses | 
                                                2,951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,282,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) before income taxes | 
                                                398,343,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                438,420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Gross profit | ||
| Extraordinary income | ||
| Extraordinary losses | ||
| Income taxes | 
                                                62,498,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                139,289,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) | 
                                                335,845,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                299,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |